
public class week1 {

	public static void main(String[] args) {
		int x=0,y;
		y = x+3;
		System.out.println("x = " + x);
		System.out.println("y = " + y);
		x = 5;
		System.out.println("x = " + x);
		System.out.println("y = " + y);
		int z = x;
		System.out.println("z = " + z);
		x = 7;
		System.out.println("z = " + z);
		byte num = 127;
		System.out.println(num+1);
		System.out.println((byte)(num+1));
		
		double number = 3.0;
		float number2 = 3.0f;
		
		double a = 3.5;
		double pai = 3.14;
		double C = 2*pai*a;
		double S = pai*a*a;
		System.out.println(C);
		System.out.println(S);
	}

}
